CN113334840A - Multilayer hot-pressing single-cavity row die and hydraulic press - Google Patents
Multilayer hot-pressing single-cavity row die and hydraulic press Download PDFInfo
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- CN113334840A CN113334840A CN202110647823.3A CN202110647823A CN113334840A CN 113334840 A CN113334840 A CN 113334840A CN 202110647823 A CN202110647823 A CN 202110647823A CN 113334840 A CN113334840 A CN 113334840A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/32—Discharging presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
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Abstract
本发明提供一种多层热压单腔排模，包括位于顶层的顶模组件，位于底层的底模组件，位于中间层的一组或多组中模组件，加热机构；顶模组件由顶模座和其下方固定的上模组构成，底模组件由底模座和其上方固定的下模组构成，每一组中模组件均由中模座和其上方固定的下模组及其下方固定的上模组构成；每一组上模组与其相邻的下方的下模组相配合构成一层热压单腔排模；下模组有并排的多个模腔，每个模腔的前端开口没有端壁，上模组有与下方相邻的下模组对应的并排的多个模头，模头的前端固定有用于封挡模腔前端开口的封口板。该结构的多层热压单腔排模，大大降低所需的空间高度。本发明还提供一种包含上述多层热压单腔排模的液压机。
The invention provides a multi-layer hot-pressing single-cavity row mold, comprising a top mold component located on the top layer, a bottom mold component located on the bottom layer, one or more sets of middle mold components located on the middle layer, and a heating mechanism; The assembly consists of a top die base and an upper die set fixed below it, the bottom die set consists of a bottom die set and a lower die set fixed above it, and each set of middle die assemblies is fixed by a middle die set and its top. The lower module and the upper module fixed below it; each set of upper modules cooperates with the adjacent lower module to form a layer of hot-pressed single-cavity row molds; the lower module has a plurality of side-by-side molds Cavity, the front opening of each cavity has no end wall, the upper die set has a plurality of die heads corresponding to the lower die set adjacent to the lower side, and the front end of the die head is fixed with a sealing plate for blocking the front opening of the die cavity . The multi-layer hot-pressing single-cavity row mold of this structure greatly reduces the required space height. The present invention also provides a hydraulic press comprising the above-mentioned multi-layer hot-pressing single-cavity die.
Description
Technical Field
The invention belongs to the technical field of hot-pressing dies and hydraulic presses, and particularly relates to a multi-layer hot-pressing single-cavity row die and a hydraulic press thereof.
Background
In the technical field of hot press molding, taking hot press molding of an automobile drum brake pad as an example, a single-cavity barrel mold, a multi-cavity barrel mold, a four-layer eight-strip type row mold, a four-layer 24-piece type single-cavity row mold and the like appear and are applied in sequence in a hot press molding mold. The multi-layer single-cavity row die represented by four layers of 24 sheets, such as the utility model patent of the name 'a lower ejection type single-cavity row die group' of 201920799934.4 of the applicant, overcomes the defects that the single-cavity barrel die is not uniformly heated, the product quality is unstable, the production efficiency is low, the multi-cavity barrel die is non-uniformly heated and the product quality is unstable, and four layers of eight-strip type row dies need to be additionally provided with a pre-forming (cold pressing) process, a hot-press forming rear sheet cutting process and the like.
However, this multi-layer matrix has its own drawbacks: the hot-pressing die consists of an upper die head (also known as a male die, a male die and the like) and a lower die cavity (also known as a female die, a female die and the like), wherein when a workpiece is fed before pressing and taken out after pressing, the die head and the die cavity are in a split-die state of being separated from each other up and down, the distance between the die head and the die cavity is enough to complete feeding and taking space, and the die head and the die cavity have the height, so that the die occupies a larger upper space and a larger lower space in a die opening state. And because the multilayer pressing die operates in multiple layers simultaneously, the upper and lower spaces used by the die arrangement of each layer are calculated in an accumulated mode in the die opening state. The two problems are caused, one is that the maximum opening height and the effective stroke of the hydraulic machine are limited, so that various conventional hydraulic machines cannot meet the requirements; secondly, too high space is inconvenient for workers to operate. Taking the most common traditional four-column 500T hydraulic press as an example, the minimum opening height is 600mm, the hydraulic cylinder stroke is 900mm, and the maximum opening height is 1500 mm. The stroke and the height can not meet the working requirement of a single-cavity die array of the four-layer brake pad, and a hydraulic machine with larger stroke and higher price is required to be configured.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the novel multilayer hot-pressing single-cavity row die and the hydraulic machine, which can fully utilize the working space of the hydraulic machine, save the cost of the hydraulic machine and facilitate the operation of workers.
The technical scheme for realizing the aim of the invention is as follows.
One-layer and multi-layer hot-pressing single-cavity row die
The multi-layer hot-pressing single-cavity row die comprises a top die assembly positioned on the top layer, a bottom die assembly positioned on the bottom layer and one or more groups of middle die assemblies positioned on the middle layer. The top die assembly consists of a top die base and an upper die set fixed below the top die base, the bottom die assembly consists of a bottom die base and a lower die set fixed above the bottom die base, and each middle die assembly consists of a middle die base, a lower die set fixed above the middle die base and an upper die set fixed below the middle die base.
Each group of upper die set is matched with the lower die set below the upper die set to form a layer of single-cavity row die, namely, the upper die set of the top die assembly is matched with the lower die set of the middle die assembly below the top die assembly, the upper die set of the middle die assembly above the middle die assembly is matched with the lower die set of the middle die assembly below the middle die assembly, and the lower die set of the bottom die assembly is matched with the upper die set of the middle die assembly above the bottom die assembly. Therefore, the lower die set and the upper die set of each middle die set belong to the upper die set and the lower die set respectively.
And the upper ends of the four guide rods are fixed with the four corners of the top die holder and downwards penetrate through the guide holes at the four corners of each middle die holder and each bottom die holder so as to keep the alignment of each layer of die arrangement and ensure the smooth motion. The structure replaces a common die carrier, has simple structure and reduces the thickness of the die.
The heating mechanism in the present invention adopts the hot-pressing heating mechanism in the prior art, such as electric heating, hot oil heating, etc., and is not described herein again.
The hot pressing process usually generates hot air in the pressing process, and the closed die needs to be opened slightly once or for multiple times to remove the hot air in time. In the invention, except for the lowest die, an air release action assembly positioned on two sides is arranged between the upper die set and the lower die set of each layer of die row and is used for opening and closing the die slightly in a stroke-controllable manner so as to remove hot air in time.
The lower die set has a plurality of die cavities side by side, each die cavity having a front opening without an end wall. The upper die set is provided with a plurality of die heads which are arranged side by side and correspond to the lower die set adjacent to the lower side, and a sealing plate for sealing an opening at the front end of the die cavity is fixed at the front end of each die head.
Preferably, the lower die set has two rows of cavities arranged in a back-to-back relationship, each row having three cavities side-by-side, the front opening of each cavity 51 being free of an end wall. The upper die set is provided with two rows of die heads which are arranged in a back direction and correspond to the lower die set, each row is provided with three die heads which are arranged side by side, and the front end of each die head is fixed with a sealing plate for sealing an opening at the front end of the die cavity.
As the preferred scheme, the upper end surfaces of the middle die holder and the bottom die holder are fixedly provided with sealing plate limiting blocks. After the die is closed, the sealing plate is limited by the sealing plate limiting block, so that the lateral thrust of the pressed work material on the sealing plate is overcome, the sealing plate can stably cover the opening of the sealing die cavity, and the work material is prevented from leaking from the die cavity.
The mold cavity of the existing hot-pressing mold is only provided with an opening at the upper part and is enclosed at the periphery, and the mold head extends into the mold cavity to form a closed space for pressing from top to bottom. The structure needs to feed and discharge the workpieces through the upper opening of the die cavity, and a higher die opening height is required. The mold cavity of the present invention has an increased front opening that is closed by a sealing plate fixed to the front end of the die head when the mold is closed. Thus, the feeding and the discharging can be carried out by the front end opening, and the die opening height is greatly reduced.
According to the preferable scheme, the interiors of the middle die holder and the top die holder are fixedly connected with the top of the sealing plate through longitudinal sealing plate screws, the sealing plate is fixedly connected with the outer side wall of the die head through transverse die head screws, a fixing pressing strip is embedded in the inner end wall, far away from the sealing plate, of the die head, and the fixing pressing strip is fixedly connected with the lower end faces of the top die holder and the middle die holder through pressing strip screws.
The lower surface of the die head and the inner surface of the die cavity are both the molding surfaces of the die-casting workpiece, and defects are not allowed. Therefore, in the embodiment, the die cavity at the upper part and the die head at the lower part of the same middle die assembly are assembled together through the fixing pressing strip and the sealing plate, and the die heads and the die cavity are not fixed through screws, so that the damage to the forming surface of the die is avoided, and the processing precision is effectively ensured. In the subsequent maintenance process, the disassembly is convenient, and the subsequent maintenance is convenient.
In the hot press molding process, in order to take out a molded workpiece, an ejector is generally provided at the bottom of a cavity to eject the molded workpiece. In the prior art, because the workpiece is taken out from the upper opening of the die cavity, the ejection mechanism needs to have a large stroke to be enough to eject the workpiece to be higher than the opening of the die cavity. Thus, the bottom of the mold cavity needs to have a larger height space to accommodate the ejection mechanism, thereby increasing the thickness of the mold. On the other hand, the ejection device in the prior art usually controls the ejection and retraction actions of the ejection rod in a mechanical transmission mode, and has a complex structure and poor working reliability.
The ejection device scheme of the invention is that a pneumatic ejection device is arranged at the bottom of each die cavity in the lower die set, and the ejection device comprises the following components: the piston rod corresponding to each die cavity consists of an upper ejector rod and a lower piston and is arranged in the cylinder; the upper ejector rod can extend into the die cavity through the opening on the bottom surface of the die cavity, and when the ejector rod retracts, the top surface of the ejector rod is flush with the bottom surface of the die cavity; the upper part of the middle die base and the lower part of the bottom die base are provided with a middle die base and a bottom die base, the middle die base and the bottom die base are respectively communicated with the middle die base and the bottom die base, and the bottom die base are respectively communicated with the middle die base and the bottom die base.
As a preferred scheme, the lower end faces of the middle die holder and the bottom die holder are directly provided with the cylinders, the die head covers the bottom of the upper cylinder of the die head, the middle die holder and the bottom die holder are used as cylinder bodies of the cylinders, an ejection cylinder does not need to be purchased additionally, and the cost is reduced.
After the workpiece is molded and the die is opened, high-pressure gas is introduced into the ejection gas passages and enters the ejection gas cavities to drive the ejection piston rods to ascend, so that the ejector rods extend into the die cavities to jack the molded workpiece, and the blanking operation is convenient. After the workpiece is taken out, high-pressure gas is introduced into the retraction gas channel, enters each retraction gas cavity and drives the ejection piston rod to retract.
Because the workpiece is taken out from the front end opening of the die cavity, the workpiece can be grabbed by an operator or clamped by a clamp to be taken out as long as the workpiece is jacked up to a smaller height. In this way, the piston rod can be set shorter, thereby reducing the thickness of the mold.
Preferably, the cylinder is located at a position shifted forward in the front-rear direction while being as close to the middle as possible. In the present invention, the entire workpiece need not be lifted, but only the end near the opening of the cavity 51. Through the position of rational arrangement cylinder, the length of further shortening the piston rod is in order to further reduce the thickness of mould. The front end of the cylinder is deviated in the front-back direction to enable the front end of the workpiece to be tilted, the lever principle is utilized when the cylinder is close to the middle, and the front end of the workpiece can be tilted higher due to the same extending amount of the piston rod. This allows the length of the piston rod to be further shortened to further reduce the thickness of the mold.
Summarizing the technical scheme of the invention, the high-altitude space of the multi-layer hot-pressing single-cavity row die is reduced from three aspects: firstly, a guide rod replaces a die carrier in the prior art, so that the height increased by using the die carrier is saved; secondly, the front end of the die cavity is opened, so that the die opening height required by the prior art is reduced; thirdly, the requirement of the ejection height of the workpiece is reduced, so that the height of the ejection device is reduced, and the thickness of the die is reduced. The technical scheme can utilize the effective working space of the hydraulic machine to the maximum extent. On one hand, the cost of the multi-layer die array can be saved, and more importantly, the hydraulic press with lower price and smaller opening height and shorter stroke can be utilized to accommodate the hot-pressing single-cavity die array with the number of layers as many as possible. Meanwhile, the operation of workers is also facilitated.
Second, hydraulic press
The invention also provides a hydraulic machine which comprises a slide block, a workbench, a stand column and a control system, wherein the multilayer hot-pressing single-cavity row die is arranged between the slide block and the workbench. The top die base of the multilayer hot-pressing single-cavity row die is fixedly connected with the sliding block, and a heat insulation layer can be arranged between the top die base and the sliding block; the bottom die holder of the multilayer hot-pressing single-cavity die array is connected with the workbench, and a heat insulation layer can be arranged between the bottom die holder and the workbench; the position of the workbench corresponding to the guide rod of the multi-layer hot-pressing single-cavity die array is provided with a containing cavity or a through hole so as to avoid the guide rod extending downwards during die assembly.
The technical scheme of the invention can enable the traditional four-column hydraulic press to be suitable for the purpose of the invention by slightly modifying the traditional four-column hydraulic press. The manufacturer of the existing traditional hydraulic machine does not need to replace the equipment, and can select the hydraulic machine with lower price and smaller opening height when buying new equipment.
Drawings
FIG. 1 is a schematic diagram of a front side mold opening state of a multi-layer hot-pressing single-cavity row mold of the invention;
FIG. 2 is a schematic view of the mold assembly of the present invention in a front mold assembly state with a plurality of layers of hot pressing and single cavity;
FIG. 3 is a schematic view of the side mold opening state of the multi-layer hot-pressing single-cavity row mold of the present invention;
FIG. 4 is a schematic view of the side clamping condition of the multi-layer single-cavity die row of the present invention;
FIG. 5 is a schematic front view of a middle die assembly in the present invention;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a side view of FIG. 5;
FIG. 8 is a schematic representation of the hydraulic machine of the present invention.
According to the needs of the display emphasis of each figure, different details are respectively omitted for the sake of simplicity and clarity, so the details displayed on the corresponding parts of each figure are not completely consistent.
The labels in the figure are:
100-hydraulic press, 101-slide block, 102-workbench and 103-upright post; 200-multilayer hot-pressing single-cavity row die, 201-top die assembly, 202-bottom die assembly, 203-middle die assembly; 300-control system.
1-a top die holder, 2-a bottom die holder and 3-a middle die holder;
4-upper die set, 41-die head, 42-sealing plate, 43-fixed pressing bar, 44-longitudinal sealing plate screw and 45-transverse die head screw; 5-lower die set, 51-die cavity, 52-pneumatic ejection device, 521-piston rod, 522-ejection air channel, 523-retraction air channel and 53-sealing plate limiting block; 6-deflation action component, 7-guide rod, 71-guide hole.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
One-layer and multi-layer hot-pressing single-cavity row die
As shown in fig. 1-4. The multi-layer hot-pressing single-cavity row die comprises a top die assembly 201 positioned at the top layer, a bottom die assembly 202 positioned at the bottom layer, and one or more (three in the embodiment) middle die assemblies 203 positioned at the middle layer. The top die assembly 201 is composed of a top die base 1 and an upper die set 4 fixed below the top die base, the bottom die assembly 202 is composed of a bottom die base 2 and a lower die set 5 fixed above the bottom die base, and each middle die assembly 203 is composed of a middle die base 3, a lower die set 5 fixed above the middle die base and an upper die set 4 fixed below the middle die base.
Each group of upper die set 4 is matched with the lower die set 5 below the upper die set 4 to form a layer of hot-pressing single-cavity row die, namely, the upper die set 4 of the top die assembly 201 is matched with the lower die set 5 of the middle die assembly 203 below the upper die set, the upper die set 4 of the middle die assembly 203 above the middle die assembly 203 is matched with the lower die set 5 of the middle die assembly 203 below the middle die assembly, and the lower die set 5 of the bottom die assembly 202 is matched with the upper die set 4 of the middle die assembly 203 above the bottom die assembly. Therefore, the lower die set 5 and the upper die set 4 of each middle die assembly 203 belong to the upper die set and the lower die set respectively. The present embodiment includes three sets of middle mold assemblies 203, which together with the upper mold assembly 201 and the lower mold assembly 201 form a four-layer hot pressing single cavity row mold.
The heating mechanism in this embodiment adopts a hot-pressing heating mechanism in the prior art, such as electric heating, hot oil heating, and the like. And is not shown in the figure.
The hot pressing process usually generates hot air in the pressing process, and the closed die needs to be opened slightly once or for multiple times to remove the hot air in time. In the embodiment, except for the lowest die, an air discharge action assembly 6 is arranged between the upper die set 4 and the lower die set 5 of each layer of die row and is used for slightly opening and closing the die with controllable stroke to discharge hot air in time.
In this embodiment, four guide rods 7 (fig. 3 and 4) are further included, the upper ends of which are fixed to four corners of the top die holder 1 and pass downward through guide holes 71 at four corners of each of the middle die holder 3 and the bottom die holder 2, so that the alignment of the dies in each row is maintained and the movement is smooth. The structure replaces a common die carrier, has simple structure and reduces the thickness of the die.
As shown in fig. 5-7. Since the structure of each of the upper and lower die sets 4 and 5 is the same, the structures of the middle die assembly and the upper and lower die sets 4 and 5 will be described simultaneously with a set of middle die assemblies.
The upper part of the middle die component is fixed with a lower die set 4, and the lower part is fixed with an upper die set 5. Each set of lower dies 5 has two rows of cavities 51 arranged in a back-to-back manner, each row having three cavities 51 arranged side by side, the front end opening of each cavity 51 being free of end walls. Each set of upper die set 4 has two rows of die heads 41 arranged in a back-to-back manner corresponding to the lower die set 5, each row has three die heads 41 arranged side by side, and a sealing plate 42 for sealing the front end opening of the die cavity is fixed at the front end of each die head 41.
The mold cavity of the existing hot-pressing mold is only provided with an opening at the upper part and is enclosed at the periphery, and the mold head extends into the mold cavity to form a closed space for pressing from top to bottom. The structure needs to feed and discharge the workpieces through the upper opening of the die cavity, and a higher die opening height is required. The cavity 51 of the present invention has an increased front opening that is closed by the sealing plate 42 fixed to the front end of the die 41 during mold clamping. Thus, the feeding and the discharging can be carried out by the front end opening, and the die opening height is greatly reduced.
The upper end surface of the middle die holder 3 (the bottom die holder 2 is also the same) is distributed and fixed with a sealing plate limiting block 53. After the die is assembled, the sealing plate 42 is limited by the sealing plate limiting block 53, the side thrust of the pressurized work material to the sealing plate 42 is overcome, the sealing plate 42 can be ensured to stably cover the opening of the sealing die cavity, and the work material is prevented from leaking from the die cavity 51.
The interior of the middle die holder 3 (the top die holder 1 is the same as the top die holder) is fixedly connected with the top of the sealing plate 42 through a longitudinal sealing plate screw 44, the sealing plate 42 is fixedly connected with the outer side wall of the die head 41 through a transverse die head screw 45, the inner end wall of the die head 41 far away from the sealing plate 42 is embedded with a fixing pressing strip 43, and the fixing pressing strip 43 is fixedly connected with the lower end face of the top die holder 1 or the middle die holder 3 through a pressing strip screw.
The lower surface of the die head 41 and the inner surface of the die cavity 51 are both formed surfaces of die casting workpieces, and defects are not allowed. Therefore, in this embodiment, the die cavity 41 at the upper part and the die head 51 at the lower part of the same middle die assembly are assembled together through the fixing pressing strip 43 and the sealing plate 42, and the die head 41 and the die cavity 51 are not fixed through screws, so that the damage to the die forming surface is avoided, and the processing precision is effectively ensured. In the subsequent maintenance process, the disassembly is convenient, and the subsequent maintenance is convenient.
In the hot press molding process, in order to take out a molded workpiece, an ejector is generally provided at the bottom of a cavity to eject the molded workpiece. In the prior art, because the workpiece is taken out from the upper opening of the die cavity, the ejection mechanism needs to have a large stroke to be enough to eject the workpiece to be higher than the opening of the die cavity. Thus, the bottom of the mold cavity needs to have a larger height space to accommodate the ejection mechanism, thereby increasing the thickness of the mold. On the other hand, the ejection device in the prior art usually controls the ejection and retraction actions of the ejection rod in a mechanical transmission mode, and has a complex structure and poor working reliability.
In the embodiment of the ejection device, a pneumatic ejection device 52 is provided at the bottom of each cavity 51 in the lower die set 5, and is configured to: a piston rod 521 corresponding to each mold cavity 51, which is composed of an upper ejector rod and a lower piston and is arranged in the cylinder; the upper ejector rod can extend into the die cavity through the opening on the bottom surface of the die cavity 51, and when the ejector rod retracts, the top surface of the ejector rod is flush with the bottom surface of the die cavity; an upper retraction air cavity and a lower ejection air cavity are enclosed between the cylinder pistons, an ejection air passage 522 and a retraction air passage 523 are further formed inside the middle die base 3 and the bottom die base 2, the ejection air passage 522 is respectively communicated with each ejection air cavity, and the retraction air passage 523 is respectively communicated with each retraction air cavity.
The cylinders can be directly arranged on the lower end surfaces of the middle die holder 3 and the bottom die holder 2, the die head 41 covers the bottom of the upper cylinder of the middle die holder, the middle die holder 3 and the bottom die holder 2 are used as cylinder bodies of the cylinders, an ejection cylinder does not need to be purchased additionally, and cost is reduced.
After the workpiece is molded and the die is opened, high-pressure gas is introduced into the ejection gas channel 522, enters each ejection gas cavity, drives the ejection piston rod 521 to ascend, enables the ejector rod to extend into the die cavity 51, and can eject the molded workpiece, and the blanking operation is convenient. After the workpiece is taken out, high-pressure gas is introduced into the retraction gas channel 523 and enters each retraction gas cavity to drive the ejection piston rod 521 to retract.
Since the present invention takes out the workpiece from the front end opening of the cavity 51, the operator can grasp or hold the workpiece with the jig as long as the workpiece is lifted up by a small height. In this way, the piston rod can be set shorter, thereby reducing the thickness of the mold. The length of the piston rod can be further shortened by reasonably arranging the position of the air cylinder, so that the thickness of the die is further reduced. In the present invention, the entire workpiece need not be lifted, but only the end near the opening of the cavity 51. The position of the cylinder can be deviated from the front end in the front-back direction and simultaneously is close to the middle as much as possible, the deviated front end is used for tilting the front end of the workpiece, the position close to the middle utilizes the lever principle, and the same extension amount of the piston rod can enable the front end of the workpiece to be tilted higher. This allows the length of the piston rod to be further shortened to further reduce the thickness of the mold.
Summarizing the technical solution of the present embodiment, the high-altitude space of the multi-layer hot-pressing single-cavity row mold is reduced from three aspects: firstly, a guide rod 7 is used for replacing a die carrier in the prior art, so that the height increased by using the die carrier is saved; secondly, the front end of the die cavity 51 is opened, so that the die opening height required by the prior art is reduced; thirdly, the requirement of the ejection height of the workpiece is reduced, so that the height of the ejection device is reduced, and the thickness of the die is reduced. The technical scheme can utilize the effective working space of the hydraulic machine to the maximum extent. On one hand, the cost of the multi-layer die array can be saved, and more importantly, the hydraulic press with lower price and smaller opening height and shorter stroke can be utilized to accommodate the hot-pressing single-cavity die array with the number of layers as many as possible. Meanwhile, the operation of workers is also facilitated.
Second, hydraulic press
As shown in fig. 8. The hydraulic machine 100 of the embodiment comprises a slide block 101, a workbench 102, a stand column 103 and a control system 300, wherein the multilayer hot-pressing single-cavity row die 200 of the embodiment is arranged between the slide block 101 and the workbench 102. The top die base 1 of the multilayer hot-pressing single-cavity row die 200 is fixedly connected with the sliding block 101, and a heat insulation layer can be arranged between the top die base and the sliding block; the bottom die base 2 of the multilayer hot-pressing single-cavity row die 200 is connected with the workbench 102, and a heat insulation layer can be arranged between the bottom die base 2 and the workbench 102; the position of the workbench corresponding to the guide rod 7 of the multi-layer hot-pressing single-cavity row die 200 is provided with a cavity or a through hole (not shown in the figure) so as to avoid the guide rod 7 extending downwards during die assembly.
Claims (12)
1. The utility model provides a mould is arranged in single chamber of multilayer hot pressing, is including top mould subassembly (201) that are located the top layer, is located bottom mould subassembly (202) of bottom layer, is located mould subassembly (203) in a set of or the multiunit in intermediate level, heating mechanism, its characterized in that: the top die assembly (201) consists of a top die holder (1) and an upper die set (4) fixed below the top die holder, the bottom die assembly (202) consists of a bottom die holder (2) and a lower die set (5) fixed above the bottom die holder, and each middle die assembly (203) consists of a middle die holder (3), a lower die set (5) fixed above the middle die holder and an upper die set (4) fixed below the middle die holder; each group of upper modules (4) is matched with the lower module (5) adjacent to the upper module to form a layer of hot-pressing single-cavity row die; the lower die set is provided with a plurality of die cavities (51) which are arranged side by side, the front end opening of each die cavity (51) is not provided with an end wall, the upper die set (41) is provided with a plurality of die heads (41) which are arranged side by side and correspond to the lower die set (51) adjacent to the lower side, and the front ends of the die heads (41) are fixedly provided with sealing plates (42) for sealing the front end openings of the die cavities (51).
2. A multi-layer, hot-pressing, single-cavity row die as claimed in claim 1, wherein: four guide rods (7) are arranged, the upper ends of the four guide rods are fixed with four corners of the top die holder (1), and the four guide rods downwards penetrate through guide holes (71) at four corners of the middle die holder (3) and the bottom die holder (2).
3. A multi-layer hot-pressing single-cavity row die as claimed in claim 1 or 2, wherein: except for the lowest hot-pressing single-cavity row die, an air release action assembly (6) positioned on two sides is arranged between the upper die set (4) and the lower die set (5) of each hot-pressing single-cavity row die.
4. A multi-layer hot-pressing single-cavity row die as claimed in claim 1 or 2, wherein: the middle die assembly (203) is provided with three groups, the lower die assembly (5) is provided with two rows of die cavities (51) which are arranged back to back, each row is provided with three die cavities (51) which are arranged side by side, the upper die assembly (4) is provided with two rows of die heads (41) which are arranged back to back and correspond to the lower die assembly (5), and each row is provided with three die heads (41) which are arranged side by side.
5. A multi-layer hot-pressing single-cavity row die as claimed in claim 1 or 2, wherein: and sealing plate limiting blocks (53) are distributed and fixed on the upper end surfaces of the middle die holder (3) and the bottom die holder (2).
6. A multi-layer hot-pressing single-cavity row die as claimed in claim 1 or 2, wherein: the inner parts of the middle die holder (3) and the top die holder (1) are fixedly connected with the top of the sealing plate (42) through longitudinal sealing plate screws (44), the sealing plate (42) is fixedly connected with the outer side wall of the die head (41) through transverse die head screws (45), the inner end wall, far away from the sealing plate (42), of the die head (41) is embedded with a fixing pressing strip (43), and the fixing pressing strip (43) is fixedly connected with the lower end face of the top die holder (1) or the middle die holder (3) through pressing strip screws.
7. A multi-layer hot-pressing single-cavity row die as claimed in claim 1 or 2, wherein: the lower die set (5) is provided with a pneumatic ejection device (52) corresponding to the bottom of each die cavity (51), the pneumatic ejection device is formed by arranging a piston rod (521) corresponding to each die cavity (51), and the piston rod consists of an upper ejector rod and a lower piston and is arranged in a cylinder; the upper ejector rod can extend into the die cavity through an opening on the bottom surface of the die cavity (51), and the top surface of the ejector rod is flush with the bottom surface of the die cavity in a retraction state; the upper retraction air cavity and the lower ejection air cavity are enclosed between the cylinder pistons, the ejection air passages (522) and the retraction air passages (523) are further formed in the middle die base (3) and the bottom die base (2), the ejection air passages (522) are respectively communicated with the ejection air cavities, and the retraction air passages (523) are respectively communicated with the retraction air cavities.
8. A multi-layer, hot-pressing, single-cavity row die as claimed in claim 7, wherein: the cylinders are arranged on the lower end faces of the middle die holder (3) and the bottom die holder (2), and the die head (41) covers the bottom of the upper cylinder.
9. A multi-layer, hot-pressing, single-cavity row die as claimed in claim 7, wherein: the cylinder is positioned at the front end and close to the middle of the front and back direction of the bottom surface of the die cavity.
10. A hydraulic press, comprising a slide block (101), a workbench (102), a column (103) and a control system (300), characterized in that the multilayer hot-pressing single-cavity row die (200) as claimed in claim 1 is arranged between the slide block (101) and the workbench (102), a top die holder (1) of the multilayer hot-pressing single-cavity row die (200) is fixedly connected with the slide block (101), and a bottom die holder (2) is connected with the workbench (102).
11. A hydraulic machine according to claim 10, characterized in that: the multi-layer hot-pressing single-cavity row die (200) is provided with four guide rods (7), the upper ends of the four guide rods are fixed with the four corners of the top die holder (1) and downwards penetrate through guide holes (71) at the four corners of the middle die holder (3) and the bottom die holder (2), and a containing cavity or a through hole for avoiding the guide rods (7) is formed in the position, corresponding to the guide rods (7), of the workbench (102).
12. A hydraulic machine according to claim 10 or 11, characterized in that: a pneumatic ejection device (52) is arranged at the bottom of each die cavity (51) in the lower die set (5) of the multi-layer hot-pressing single-cavity row die (200), a piston rod (521) is formed corresponding to each die cavity (51), and the piston rod is composed of an upper ejector rod and a lower piston and is arranged in a cylinder; the upper ejector rod can extend into the die cavity through an opening on the bottom surface of the die cavity (51), and the top surface of the ejector rod is flush with the bottom surface of the die cavity in a retraction state; the upper retraction air cavity and the lower ejection air cavity are enclosed between the cylinder pistons, the ejection air passages (522) and the retraction air passages (523) are further formed in the middle die base (3) and the bottom die base (2), the ejection air passages (522) are respectively communicated with the ejection air cavities, and the retraction air passages (523) are respectively communicated with the retraction air cavities.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110647823.3A CN113334840A (en) | 2021-06-10 | 2021-06-10 | Multilayer hot-pressing single-cavity row die and hydraulic press |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110647823.3A CN113334840A (en) | 2021-06-10 | 2021-06-10 | Multilayer hot-pressing single-cavity row die and hydraulic press |
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